Remote control for power units



No .24, 1953 R. L. woRRELL. ETAL REMOTE CONTROL FOR POWER UNITS Filed March 18, 1950 Patented Nov. 24, 1953 Aiiiiiieetitii Meten is, 1950,;SeiieiNeiiittitz.

Thisv invrititii ieiates t'eiieitii" tette ieiiiote.

ctnteinee witifithe etti/isi@ ,imthtnisitiiite cuiiarly adeleted`1` but not limi' ci; tothe control it repented one Ametilemeeiiiiie ing arop mtchne Such as a. combine oi` a one in an pickup biili, itie often necessary or desirable, depende mi. n 'C'Oi CI'tiQIS, t0 trmltcpeatbn of tlec'rop treating ili'l'e'chainsrn` Ariclnwtlfil thel type of controls heretofore: commonly employed; such termination nects'stet'tesl the operator `stop ping'l the tractor andv then d'SmOuntingtovmgt nipulate the, usual clutch and throttlecontrols othe poiizeij` vunit on the triilng machine. This Drcetluife is extremely inconvenient and lin addi; tionwastes considerable time. Consequently, it is desirable to pjroyile themower unit on the trailing machine with a, combnedltclutnch and throtue' cqiitrm mette utilizing 'a nexibieeable or th like` which can be readily extended-to av position Within ey reach of aper'son seatedwit tiie'epeiato'rs stetieii ojn the tractor, l

Numerous attempts have been melde topii/de power units with, suitable combined clutch and tijiottle ,contfri means, Van-d* wn attempts have ieeuited, in, L apia'retue: attuati@ fltiiriijfi4 remote, .point t thtouglii theiieek of a ltelltale e oi'lailige mearlS, the apba'atus of thistyi heire-AV tOOeL devised has been entirely tori V-comnlicatiiad and costly for satisfactory applictionrandusc.,

on 111051; agricultural. machines.

Moreover',` in

unevenv ground at speeds. of as much ofr more 'than five miles. per houx'. thus. subjecting all controlvappetratus' thereon tcfconsdeible shook? and vibration. And it will` beeppreciateejthett troubleefreev 'operation under such condtiois,

nitiii. Iii etiiiitioit-` control mechenieiii tfg tits iike bf; the., @19p beine harvested.: otherwise treaitedmrub" the likta elem ts of Weeda a'd bushes boidefiiieetiie fiele b einguwgrk win further increases the heizittci to stttisitietiiiV irliwhejieiii;

ig. ifie epltiiitiew et attractor andtjreiiihg 1 tiene ii'iiitiiietitn efiibpdyijtg the iii-V inten eine tiirettieietersrtiiewfi eeeee ane'eiieiiieitiline y tile fee portion fjtiiejtracte y, u the inteieetofeiitipliiicatinii Fie. 2 it et eine. ",eei tien View. ei the ineii f1, Qi tiiiiiibwi uint ttiitreiv apiter'etii Shi .1f1`11.1e.1:?l

Ft isitri,eiiliuteetiside,elevationefthetone tiel mettiti,iiisifriV sriojwi'tiii Fie.; 11 with ,the 'table guide. Dullcyaldgmostoi theclablniitedl;

Fig. eis; @hetnet side. elevation showing the eiiiteh .1eve1f. emesse-emite 'parte their tlil' hlelleaSngpQre ons; Y v

Eig.r istill'lancther sieelevatn, 'slinvtingv the ll'licltleiii zuid` associated. petits, inltiiirl cliitsiheiigeeeeiiesi neme I Y .a1 side eievetieiishewie, "ei-ted partslmoved t ,d juetp'rio'rto eai aseuiiflin tlieqiiionslshpwn-in Fiel. s. he?. fiile t Fit- 1 iii-the: diewiiie it wiiite seen that t ntoii (isf implied tt a'rble a'g'1"iciliiiiittl` rn "elaineY I v coupled in.` trailingfeliz,T tient@ ijietijj sttutiifezlof @conventional te'eyeteijA zi, the letter including encepetatorsista a' .theusiie centime of which. the s teeririgwheeli s ,.ievsnewii. The .mobile Y transverse axle structure 1 mounting similar ground engaging wheels 8 adjacent opposite ends thereof (only the near wheel being shown) and a pair of forwardly converging members 9 and II which are joined at their forward ends to form a draft structure I 2 which is coupled to thetractor drawbar 2. A power unit I3 is operatively mounted on frame members 9 and II by means of suitable supports I4 and I6, this unit including a power take-off mechanism comprising a longitudinally fixed clutch element Il and a shiftable element i8 biased by a coaxial spring I9 into engaged driven relation with the fixed element Il. Power transmitted through this clutch means is delivered to a cross shaft 2l by means of bevel gearing 22. The shaft and gearing are operatively mounted on a transverse platform 23 spanning the rear portion of frame members 3 and l I, and the far end of shaft 2| is provided with a pulley 2A belt connected in power transmitting relation with a suitable soil or crop treating mechanism 26 constituting a part of machine l. The particular mechanism driven by means of power unit I3 is in no manner essential for a complete understanding of the present invention, and it is therefore believed that the foregoing description of same should sufce.

The engine of power unit I3 includes a conventional throttle control 2'I operated by means of a linkage 23 which in turn is actuated by a conventional speedV governor 29 operatively connected with linkage 28. As is customary in governors of this type, it is to be understood that a governor actuated arm 3| is operatively connected with linkage 28, that this arm is biased by an internal governor spring or the like (not shown) to assume a preselected engine idling position, and that as the engine load varies, the governor arm actuates linkage 28 to maintain a constant speed as determined by the initial governor setting. Disengagement of the clutch elements Il, I8 is effected by a lever 32 projecting through a slot 33 in the clutch enclosing housing 33 and which lever 32 is pivotally mounted at a low midportion thereof within housing 34 by conventional means. In this connection it should be noted that lever 32 and governor arm 3l are both movable generally in the same direction.

Simultaneous control of the clutch and throttle levers is effected by means of a rigid bar 36 (note Fig. 2) mounted for longitudinal reciprocation in a bracket 31 carried by a forward portion of the power unit. The rear end of the bar 36 is provided with a rigid extension 38 having its rear end pivotally connected with an intermediate portion of clutch lever 32. The rear power unit side of bar 36, that is the portion immediately in front of the rear extension 38, is provided with a U-shaped bracket 39 slidably mounting a rod 4I in spaced generally parallel relation to bar 36. A compression spring 42 surrounds rod il intermediate the legs of bracket 39 with the rear end of the spring abutting the rear leg of the bracket and with its forward end abutting a pin 43 inserted transversely through a portion of rod 4I immediately adjacent the inner side of the forward leg of bracket 39. The forward portion of bar 36 is provided with similarly projecting upper and lower longitudinally spaced flanges d@ and 43, respectively, and the bracket reciprocably supporting bar member 36 also mounts a latch element lll supported for turning movement on a horizontal pivot axis afforded by an attaching bolt 28. Latch element 41 is formed from a rectangular piece of flat stock (note Fig. 3) and has its opposite end edges angularly recessed to present diagonally opposite pointed ends 49, 5I and diagonally cutoff or blunt ends 52 and 53. The outer side surface of element 4l is positioned in adjacent parallel relation to the inner vertical surface of bar 36, and it will be noted (see Fig. 4) that the width. of this latch element is somewhat less than the longitudinal spacing of the adjacent edges of the upper and lower flanges 44 and 46. In this connection, it should also be noted that when latch element 4l is vertically disposed as shown in Fig. 4 the upper pointed and blunt ends 39 and 52, respectively, are substantially flush with the top edge of bar 36.

Referring again to Fig. 1 and also to Figs. 2 and 3, it is to be noted that theY clutch means is shown in its disengaged position, that is, elements Il and I3 are separated, and that the throttle lever control arm, that is, governor arm 3|, is in its engine idling position as determined by engagement with its stop means 54, the latter being schematically shown in Fig. 2. In this position it will be noted that the upper flange 44 on bar 3G overlies the blunt end 52 of latch element lll, and that the rear edge of this flange abuts the forward side of the angled edge terminating in pointed end 49. Consequently, it should be apparent that the latch element when thus positioned prevents a further rearward movement or movement to the left of bar member 36 and of the clutch lever 32 connected therewith.

In operation, assuming that it is now desired to condition the engine for load operation and to reengage the clutch means, all that has to be done is to pull forward on a cable or rope 56 having its rear end attached to the outer end of clutch lever 32 and having its forward end attached, in any suitable manner, to or near the operatcrs station t on tractor 3. Preferably this cable passes through a guide pulley or the like 5l carried by near frame member 9. This pull on the cable moves clutch lever 32 and the rigid control bar 36 forwardly to their limiting positions shown in Fig. 4, such position being determined by engagement of the clutch lever with the forward edge of the slot 33 in housing 34. As bar member 36 approaches the limiting clutch disengaged position just described, the forward edge of lower flange 55 engages the rear side edge of latch element il and turns the latter to the substantially vertical position shown in Fig. 4. As previously described rod 5I is mounted for longitudinal movement relative to bar 36, and since this rod is engaged with the throttle controlling governor arm 3l which is in turn engaged with the stop means 54, a movement of bar 36 from the position shown in Fig. 3 to the position shown in Fig. 4 merely operates to compress spring 132. With the parts thus positioned release of cable 5S enables the clutch biasing spring I9 to move shiftable clutch element I8 into rm engagement with the longitudinally fixed complementary element I'I which in turn moves clutch lever 32 and thereby bar 36 rearward or toward the left as seen on the accompanying drawing. During the initial phase of this rearward clutch engaging movement of the bar 3b", the rearward edge of upper flange i4 engages the forward edge of latch element 61 adjacent cutoff end 52 and turns this latch element into the horizontal position shown in Fig. 5 and this movement, effected by the action of spring I9, continues until bar 35, clutch lever 32 and clutch element I8 assume their limiting *clutch* engaged positionsshown in Fig. 5. In efits. bar retainina relatien similar.

acapara. 5 63 footing this. movement, it usiialm`A` desirable rigid element .extending away. from. saisi eluteli; that the relation. Y.or parts. including. 'bar 353. lever and past sai.d throttle., lever in. proXtn' tlirottlestonmeans 59, spring. 52, and rod. 4l.. tothalatter, a part carriedtbysaiderigirieeleme. issnchtnat the engineistoonditionelor atleast in position for engagement with said tnrottla partially eonditionedrtorloadonerationiustpror. 5. loyer. as .said rigid element moved: therepat tn .aetuai reensasementot the Gluten elements, in rosoonseto, a. powerl interrupting entthereby avoidinaastall condition. of4 saidelutch lever. saisilnartzloavins a. le

with tloernarts positioned. as shown Ela o tion. connection. vvitlisaidv rigid t-effe a11 t nat has tonerlonain order tod' nsagetlie to move. said throttle lever sai power .unit elutenamireondition.the. ,engine ier.V 1o distaneeandgretain.thelatter tirreno olllngopgra n is toagainA pull QlWard Qnoalolo said. rigid element. iS. .lliQVStl thfflrl Tpl? sownereoo A toa movementorsaidfelotehlever iromitsfnorvee brinssthaQrvvarQedge or cranemittinaposition t. its tower interrupting engagement. with. .therearansleo reo-esse@ edge. position, av latehins .d it Qiflatelielement 4i adiaeent tlianeinted. end flil. l5 andpresenting. a ret nina .forwarcl-` alonssidea 'portionoi saisierisid elaine. 'nuera renosi able. coaetiontherevvitn; said; late... f tlgjevlatoh emlornontashownllEig. Wnon this. tainablv'lellgaging Said llgld @l eilt liDQll has beentlona @if table t permits. the. latter having, beenmoved there oh: loiasinamoans to Inoveleyor ag.; ang bar 2.0.4 tion. interrupting Said newer tialiillpll then. rele. Sed for return to its. estatal 1t should, ne. ,apparent that engagement @disengagement of the. li .means eent,

the.. ef ne ,1" from th. engine te Saul. levers and t eretta s 1o rie 'tho` soil or crop trea ng rnoclqan'isrn may los thelY lQrrflfll I QQYSZGI. l'elzlllml trop ,by theorie terminas. whereupon the. nest.y never litiaslouslvde bed VIn l ment tnoroofshiftssaiq latch el t to t i th said Sitionior retainable engage element, and meansfo. effi una oovverln ranting. movement-oise delutehleven 2f In apoweruriit having.. aelotelieentrpllirs. the transm tit/power said-unit; te

meehanism. adapted. to be connette@ there said', clutch. inelosiina a shiftable element biasing means.. urging. Said, lift lil e element te. its

@Wer transmitting position; a Gluten lever. operatively asseeiateelawith Saidsliiitabl l mfer selectively mevinatlie latter tel a no .tien l terruntins. the transmission 0i power ther through, and having a. throttle eoritrelleveri @ladine a biasing means argine throttle, lever to preseletteclpevver output p0 tlirettleleverbeins movable, predetermined om Said preeeleeted `position the.; nl as. saidV eluteli. lever.. moves in, ins an. titer pt'enof povverftransrn lrmeehanismreemerisins fle the vSeli-llflf r alle@ telve attached tofsaideluten persnsskilledm trieart. lever.: .andextenms to a remote peint and. hee Itis-elaine@ and-oesired/to seeuraby Letters lne reSDO; v to a pull thereonto. movesaiel; Patenti luteli lever iarvvardlv--toaeluten disengaged po- 1. In a power unit having a clutch oontrolnne esti au eleneated rigidv element nivotarl-lsi.l ate. the transmission of power said unit te al tatliedtosaid Gluten lever. andtmovaloielongi-,- mechanism aoapteato be oonneeted triere-t'tn; tudinallv therewith, alatehins. deviceA carried, said o lutoninoluome a. sniftabie ere-mentener bvsafiurlit ansieeaetiilavvitri sai r1 tf.

biasing; meaneurging eaioi sniftame e1e'rn otto fer sequentially latehlns said risiellelem .t and;

t'slpowertransmittingpostiorn' a'cluth lever 69 thllby maintaining sait-1 clinton lover dis; opratively associated. with said s'l'xirtaljle. "elo: @Il gyagetiV position inresnons to a first. poll angl; mont4 for selectively..moving...thof1atter to "a no@ Tleae Q Saidfleiible means, anol, unlatch'ng, Sitien iiiteiruntirisT the transmission of power Said rigid element in. reseoase'te aseeen onli: the-Tetllffllgh, altlllaVV-Y a.; fllllttleontlolleVel" all@ Tlffa@ 0f; Sll. flpl@ mlls. Sai@ liigd ineludifi's a biasing meansursins saidthrottle elelltlltillclutlliig a U. lever tot preselected power outiiiit position/said thereef i t9 said rigidi, eleieierit-;` and throttle lever being movable a predetermined distlalflSVelSely extending legs longitudinally Slidtance away from said preselected position in the ably receiving a IOd member, a tanSl/eTSely 6X- same direction as said clutch lever moves in eftendine pin element attached to Said rod memfecting an interruption of power transmission, 70 bel' between Said legs and Serving aS a Stop lman improved Control mechanism Comprising an Siting 'the 'OIWaId longitudinal mOVemBnt Of Said elongated rigid element; mounted on Said unit I'Od relative t0 Said rigid element, and a. COmpI'eS- for reciprocaton in the general direction of said SiOn Spring mounted about said rod between one lever movement and having one end thereof 0f Sad legs and Said Din and biasing said rod pivotally connected with said clutch lever, said 75 forwardly, Said rod COCting With Said throttle 4parts herein sho odica'tions Within lever to maintain same said predetermined distance when said rigid element is positioned in said latching position and in positions forward thereof.

3. In a power unit having a clutch controlling the transmission of power from said unit to a mechanism adapted to be connected therewith, said clutch includinga shiftable element and biasing means urging said shiftable element t its power transmitting position, a clutch lever operatively associated with said shiftable element for selectively moving the latter to a position interrupting the transmission of power therethrough, and having a throttle control lever including a biasing means urging said throttle lever to a preselected power output position, said throttle lever being movable a predetermined distance away from said preselected position in the same direction as said clutch lever moves in effecting an interruption of power transmission, an improved control mechanism comprising exible means adapted to be attached to said clutch lever and extending to a remote point and being operative in response to a pull thereon to move said clutch lever longitudinally forward to a clutch disengaged position, an elongated rigid element pivotally attached to said clutch lever and movable longitudinally in response to movement of said clutch lever, a latching device carried by said unit and including a movable latch member, said latching device longitudinally slidably receiving said rigid element and coacting therewith for sequentially latching said rigid element to said movable member in response to a pull on said flexible means and a release and partial rearward movement of said rigid element by said clutch biasing means and thereby retaining said clutch in disengaged position; and unlatching said rigid element from said movable member in response to a pull on said exible means and a release resulting in a full rearwardly movement of said rigid element by said clutch biasing means thereby reengaging said clutch, said rigid element including a longitudinally slidably mounted rod biased in a forwardly direction, said rod coacting with said throttle lever to move same said predetermined distance when said clutch is moved to disengaged position, said rod remaining stationary against said throttle lever and maintaining same said predetermined distance during any period said clutch remains disengaged despite any further forward movement of said rigid element.

4. In a power unit having a clutch controlling the transmission of power from said unit to a mechanism adapted to be connected therewith, said clutch including a shiftable element and biasing means urging said shiftable element to its power transmitting position, a clutch lever operatively associated with said shiftable element for selectively moving the latter to a position interrupting the transmission of power therethrough, and having a throttle control lever including a biasing means urging said throttle lever to a preselected power output position, said throttle lever being movable a predetermined dis- 8 tance away from said preselected position in the same direction as said clutch lever moves in effecting an interruption of power transmission, an improved control mechanism comprising a flexible line adapted to be attached to said clutch lever and extending to a remote point and being responsive to a pull thereon to move said clutch lever forwardly to a clutch disengaged position, latch means adapted to be carried by said unit and including a movable latch member, an elongated rigid element pivotally attached to said clutch lever and movable longitudinally in response to movement of said clutch lever, said rigid element being longitudinally reciprocally received within said latch means and presenting longitudinally spaced portions coacting with said latch means sequentially to rotate said latch member to latching relation with said rigid element for preventing longitudinal movement of said rigid element rearwardly and thereby maintaining said clutch in disengaged position, to rotate said latch member to a first mid-latch position in response to a forwardly longitudinal movement of said rigid element, to rotate said latch member to a midlatch position in response to a rearward movement of said rigid element by said clutch biasing means, to rotate said latch member to a second mid-latch positioning by a forwardly movement of said rigid element, and to rotate said latch member to said latching relation by a rearwardly movement of said rigid member by said clutch biasing means, said rigid element including a U-part attached at the base thereof to said elongated member, said U-part presenting legs longitudinally slidably receiving a rod member, a transversely extending pin element attached to said rod between said legs and serving as a stop limiting the forward longitudinal movement of said rod relative to said rigid element, and a compression spring mounted about said rod between one of said legs and said pin element and biasing said rod in a forwardly direction, said rod coacting with said throttle lever to maintain same said predetermined distance when said rigid element is positioned in said latching relation and in positions forwardly thereof.

ROBERT L. WORRELL.

HARRY J. LEI-IKER.

FRANCIS H. VOGELSANG.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,455,676 Stark May 15, 1923 1,467,658 Thomson Sept. 11, 1923 1,651,986 Ashbaugh Dec. 6, 1927 2,140,109 Kellar Dec. 13, 1938 2,171,456 Sampson Aug. 29, 1939 2,533,967 Sobie Dec. 12, 1950 FOREIGN PATENTS Number Country Date 594,981 Great Britain Nov. 24, 1947 

